CN203320812U

CN203320812U - Concrete anti-crack reinforcing mesh

Info

Publication number: CN203320812U
Application number: CN2013204003885U
Authority: CN
Inventors: 宋明健; 陆本燕
Original assignee: Mcc 19 Chengdu Construction Co Ltd; China 19th Metallurgical Corp
Current assignee: Mcc 19 Chengdu Construction Co Ltd; China 19th Metallurgical Corp
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2013-12-04
Anticipated expiration: 2023-07-05

Abstract

The utility model relates to a reinforcing mesh, in particular to a concrete anti-crack reinforcing mesh. According to the technical scheme, the concrete anti-crack reinforcing mesh achieves the aims that the cost is low and the construction is facilitated. The concrete anti-crack reinforcing mesh comprises at least two reinforcing mesh layers. Two adjacent reinforcing mesh layers are connected through connecting rebars. Mesh openings are formed in the reinforcing mesh layers. The mesh openings in the reinforcing mesh layer on the outer layer are smaller than the mesh openings in the reinforcing mesh layer on the adjacent inner layer in size. The externally-dense and internally-sparse mode is adopted in the reinforcing mesh, meanwhile, the reinforcing mesh can be manufactured outside a site and constructed after being conveyed to the site, partition operation and construction can be carried out, and the concrete anti-crack reinforcing mesh has the advantages of being simple, rapid and the like. The phenomena that the surface of concrete cracks due to an excessively-thick protective layer, and the protective layer is peeled off and disengaged can be prevented and controlled, the strength and durability of reinforced concrete are increased, and the concrete anti-crack reinforcing mesh is particularly suitable for the situation that the protective layer of the reinforced concrete is thick.

Description

The concrete anticracking steel mesh reinforcement

Technical field

The utility model relates to steel mesh reinforcement, especially a kind of concrete anticracking steel mesh reinforcement.

Background technology

In the reinforced concrete construction process, protective layer thickness, owing to being not containing the plain concrete of reinforcing bar, easily occur peeling off disengaging, crack phenomenon, and after protective layer thickness is greater than 50mm, this phenomenon is more obvious." reinforced concrete structural design specification " 2010 editions regulations, surpass 50mm to protective layer thickness, should increase steel mesh reinforcement (sheet), but, to form of structure and the applying method of steel mesh reinforcement (sheet), there is no too much mentioning, industry circle also there is no perfect unified way.A kind of way is, directly reinforced mesh is overlapped on to the structure reinforcing bars outside, be equivalent to increase one deck reinforcing bar outside main muscle more, between the reinforcing bar of this increase and structure master muscle, adopt the welding bearing bar, adopt the stirrup that lengthens main muscle, the reinforced mesh of original structure master muscle and increase is unified to be connected and fixed.Way is comparatively loaded down with trivial details like this, is not easy to constructing operation.Another kind of way is, after setting up main reinforcement, selects reinforcing bar that diameter is less to form on steel mesh reinforcement welding and main reinforcement, then built, and so just to being built and constructing and brought inconvenience, and cost is higher.

The utility model content

Technical problem to be solved in the utility model is: provide that a kind of cost is low, the concrete anticracking steel mesh reinforcement of constructability.

The concrete anticracking steel mesh reinforcement, comprise at least two-layer steel mesh reinforcement lamella, between described adjacent two layers steel mesh reinforcement lamella, by connecting reinforcement, connects; Have mesh on described steel mesh reinforcement lamella, the size of the mesh of outer field steel mesh reinforcement lamella is less than the size of mesh of the steel mesh reinforcement lamella of adjacent internal layer.

Preferably, described steel mesh reinforcement lamella is formed by the stirrup colligation by transverse reinforcement and longitudinal reinforcement, has space D 1 between the adjacent transverse reinforcing bar, D1=d1*K, and be greater than the concrete maximum diameter of aggrogate, wherein, the diameter that d1 is transverse reinforcement, d1≤5mm, 10≤K≤15; There is space D 2 between adjacent longitudinal reinforcement, D2=d2*K, and be greater than the concrete maximum diameter of aggrogate, and wherein, the diameter that d2 is longitudinal reinforcement, d2≤5mm, 10≤K≤15.

Preferably, the vertical spacing of the steel mesh reinforcement lamella of the internal layer that described outer field steel mesh reinforcement lamella is adjacent is a (mm), a=(5～10) d, and d is the higher value among d1 and d2.

Wherein, in described concrete anticracking steel mesh reinforcement, also comprise connecting reinforcement, described steel mesh reinforcement lamella is connected with connecting reinforcement by the stirrup colligation.

Further, in described concrete anticracking steel mesh reinforcement, also comprise the support anchor bar, support anchor bar and be connected in the steel mesh reinforcement lamella of innermost layer and extend to structure master muscle direction, support the diameter >=6mm of anchor bar.

The beneficial effects of the utility model are: the concrete anticracking steel mesh reinforcement can be selected according to former thickness of concrete cover and the impact of performance; steel mesh reinforcement can adopt outer close interior thin mode to design; saved cost; simultaneously; steel mesh reinforcement can extraterrestrial making on the scene; after being transported to scene, constructed, but the district operation construction has the advantages such as simple, quick.Concrete anticracking steel mesh reinforcement of the present utility model can prevent and treat because of topping blocked up; crackle appears in concrete surface, even makes topping peel off the situation of disengaging, has increased strength of reinforced concrete; improved the steel concrete presentation quality, the especially applicable larger steel concrete situation of topping.

The accompanying drawing explanation

Fig. 1 is concrete anticracking steel mesh reinforcement schematic diagram;

Fig. 2 is individual layer reinforced mesh top view;

Fig. 3 is concrete anticracking steel mesh reinforcement and structure reinforcing bars connection diagram;

Mark in figure: 1-steel mesh reinforcement lamella; The 11-transverse reinforcement; The 12-longitudinal reinforcement; The 13-connecting reinforcement; The 14-stirrup; The 15-mesh; 16-supports anchor bar; The 4-concrete surface; The 5-structure reinforcing bars.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1, 2, 3, the concrete anticracking steel mesh reinforcement comprises at least two-layer, between described adjacent two layers steel mesh reinforcement lamella 1, by supporting anchor bar 13, connects; Have mesh 15 on described steel mesh reinforcement lamella 1, the size of outer field steel mesh reinforcement lamella 1 mesh 15 is less than the size of mesh 15 of the steel mesh reinforcement lamella 1 of adjacent internal layer.Preferably the form of " outer close interior dredging ", described " outward " refers to the direction near concrete surface, " interior " refers to the direction of close structure master muscle.Because outer field steel mesh reinforcement lamella 1 mesh 15 is little, the number of steel bars of use is many; Steel mesh reinforcement lamella 1 mesh 15 of internal layer is large, and the number of steel bars of use is few, therefore forms the form of " outer close interior dredging ", has saved cost simultaneously.

In order to be connected firmly, as shown in Figure 1, 2, 3, described steel mesh reinforcement lamella 1 is comprised of transverse reinforcement 11 and longitudinal reinforcement 12, transverse reinforcement 11 can adopt the mode of welding or colligation to be connected with longitudinal reinforcement 12, is preferably colligation, and the colligation mode can adopt conventional binding method, preferably select full bundle or interval plum blossom to prick, there is space D 1 between adjacent transverse reinforcing bar 11, D1=d1*K, and be greater than the concrete maximum diameter of aggrogate, wherein, the diameter that d1 is transverse reinforcement 11, d1≤5mm, 10≤K≤15; There is space D 2 between adjacent longitudinal reinforcement 12, D2=d2*K, and be greater than the concrete maximum diameter of aggrogate, and wherein, the diameter that d2 is longitudinal reinforcement 12, d2≤5mm, 10≤K≤15.The value of K, need make the concrete anticracking steel mesh reinforcement meet the form of " outer close interior dredging ".So K value difference of every layer of steel mesh reinforcement lamella 1.The size of the value mesh 15 by changing K, thus amount of reinforcement saved, reduce costs.

Wherein, the diameter of the reinforcing bar in each layer of steel mesh reinforcement lamella can be identical or different; As preferred version, the diameter of transverse reinforcement in the steel mesh reinforcement lamella of the diameter >=internal layer of transverse reinforcement in outer field steel mesh reinforcement lamella; The diameter of longitudinal reinforcement in the steel mesh reinforcement lamella of the diameter >=internal layer of longitudinal reinforcement in outer field steel mesh reinforcement lamella.

In order to reduce unnecessary waste, cost-saving, as above-mentioned a kind of preferred embodiment, as shown in Figure 1, 2, 3, steel mesh reinforcement lamella 1 adopts transverse reinforcement 11 and transverse reinforcement 11 colligation in the horizontal direction, longitudinal reinforcement 12 and longitudinal reinforcement colligation on its vertical direction, form foursquare mesh 15, make concrete anticracking steel mesh reinforcement structure more stable, colligation is convenient, has improved the efficiency in construction, manufacturing process.

Near structure master muscle 5, can select the reinforcing bar of diameter less due to internal layer steel mesh reinforcement lamella 1, reduce cost of manufacture; And outer reinforcement net lamella 1 in order better to prevent concrete cracking, improves its quality away from structure master muscle 5, therefore select the relatively large reinforcing bar of diameter.

For cost-saving, prevent concrete cracking, the distance between multistory reinforced net lamella 1 should guarantee in suitable scope.As a kind of preferred embodiment, as shown in Figure 1, 2, 3, the vertical spacing of the steel mesh reinforcement lamella 1 of the internal layer that outer field steel mesh reinforcement lamella 1 is adjacent is a(mm), a=(5～10) d, d is in length and breadth to the greater of bar diameter on reinforced mesh; A, in span, verifies that it takes into account materials few and guarantee the effect of concrete performance by experiment.Thereby can effectively avoid too much steel mesh reinforcement lamella 1 is set in the concrete anticracking steel mesh reinforcement, or be provided with less steel mesh reinforcement lamella 1 and cause concrete cracking, save cost of manufacture simultaneously.

In order to make concrete anticracking steel mesh reinforcement 1 be connected firmly, steel mesh reinforcement lamella 1 is connected with connecting reinforcement 13 by modes such as stirrup 14 colligations or welding, in order to facilitate the adjustment of concrete anticracking steel mesh reinforcement, reduces construction intensity, is preferably the mode of colligation.

For cost-saving, make concrete bar and structure reinforcing bars 5 be connected firmly simultaneously, in use can adopt after the good concrete anticracking steel mesh reinforcement of field fabrication to be welded in structure reinforcing bars 5 or to adopt outside the venue and make, then be transported to scene and constructed, preferably adopt the latter, wherein, also comprise in the concrete anticracking steel mesh reinforcement and support anchor bar 16, supporting anchor bar 16 is connected in the steel mesh reinforcement lamella 1 of innermost layer and extends internally, be that the concrete anticracking steel mesh reinforcement is connected by supporting anchor bar 16 with structure master muscle 5, support the diameter >=6mm of anchor bar 16; Further, support anchor bar, can take the form of single steel bar, also can adopt many reinforcing bar groups, as be made into the form such as stirrup.As shown in Figure 1, 2, 3; as preferred embodiment; concrete bar is after main reinforcement has been built; initial set is to final set; mode by static pressure or light hammering; steel mesh reinforcement is arranged to design attitude, that is, makes outermost layer steel mesh reinforcement lamella 1 meet the Minimal Protective layer thickness of code requirement apart from the distance L of concrete surface 4.

For the ease of making and installing, support the extension that anchor bar 16 also can be connecting reinforcement 13, structure reinforcing bars 13 extends to structure master muscle direction, plays the effect of supporting anchor bar 16.

Claims

1. the concrete anticracking steel mesh reinforcement, is characterized in that: comprise at least two-layer steel mesh reinforcement lamella (1), connect by connecting reinforcement (13) between described adjacent two layers steel mesh reinforcement lamella (1); Have mesh (15) on described steel mesh reinforcement lamella (1), the size of the mesh (15) of outer field steel mesh reinforcement lamella (1) is less than the size of mesh (15) of the steel mesh reinforcement lamella (1) of adjacent internal layer.

2. concrete anticracking steel mesh reinforcement according to claim 1, it is characterized in that: described steel mesh reinforcement lamella (1) is formed by stirrup (14) colligation by transverse reinforcement (11) and longitudinal reinforcement (12), the adjacent transverse reinforcing bar has space D 1 between (11), D1=d1*K, and D1 is greater than the concrete maximum diameter of aggrogate, wherein, the diameter that d1 is transverse reinforcement (11), d1≤5mm, 10≤K≤15; Adjacent longitudinal reinforcement has space D 2 between (12), D2=d2*K, and D2 is greater than the concrete maximum diameter of aggrogate, wherein, and the diameter that d2 is longitudinal reinforcement (12), d2≤5mm, 10≤K≤15.

3. concrete anticracking steel mesh reinforcement according to claim 2, it is characterized in that: the vertical spacing of the steel mesh reinforcement lamella (1) of the internal layer that described outer field steel mesh reinforcement lamella (1) is adjacent is a(mm), a=(5～10) d, d is the higher value among d1 and d2.

4. concrete anticracking steel mesh reinforcement according to claim 3 is characterized in that: also comprise connecting reinforcement (13), described steel mesh reinforcement lamella (1) is connected with connecting reinforcement (13) by stirrup (14) colligation.

5. concrete anticracking steel mesh reinforcement according to claim 4, it is characterized in that: also comprise and support anchor bar (16), support anchor bar (16) and be connected in the steel mesh reinforcement lamella (1) of innermost layer and extend to structure master muscle direction, support the diameter >=6mm of anchor bar (16).